#ifndef HEAD_H_
	#define HEAD_H_
	int fun(int *x, int *y);
	long fibonacci(long n);
	int max(int a, int b);
	int min(int a, int b);
	int (*f)(int, int);
	int *f1(int a, int b);
	int openFile();
	int readFile();
	int writeFile();
	void file_io();
#endif
	

